Computer trackball



FIG. 1 is a rear isometric view of a computer trackball showing our newdesign;

FIG. 2 is a bottom isometric view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a right side elevational view thereof in the tiltedorientation;

FIG. 7 is a rear elevational view thereof; and,

FIG. 8 is a front elevational view thereof.

The broken line drawing of an electrical cord in FIGS. 2 and 4 is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a computer trackball, as shown and described.